package org.nothing.ordermaster.controller;

import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.api.WxConsts;
import me.chanjar.weixin.common.exception.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.api.impl.WxMpServiceImpl;
import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
import org.nothing.ordermaster.enums.ResultEnum;
import org.nothing.ordermaster.exception.SellException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.net.URLEncoder;

/**
 * 微信授权相关逻辑
 */
@Controller
@RequestMapping("/wechat")
@Slf4j
public class WechatController
{
    @Autowired
    private WxMpService wxMpService;

    @GetMapping("/authorize")
    public String authorize(@RequestParam("returnUrl") String returnUrl)
    {


        //  1. 配置
        //  2. 调用 网页授权方法
        String url = "http://skyteam.iok.la/sell/wechat/userInfo";
        // 注意returnUrl要Encoder
        // String oauth2buildAuthorizationUrl(String var1, String var2, String var3);
        String redirectUrl = wxMpService.oauth2buildAuthorizationUrl(url, WxConsts.OAUTH2_SCOPE_USER_INFO, URLEncoder.encode(returnUrl));
        return "redirect:" + redirectUrl;
    }

    /**
     * 获取公众号的openid信息
     */
    @GetMapping("/userInfo")
    public String userInfo(@RequestParam("code") String code, @RequestParam("state") String returnUrl)
    {
        WxMpOAuth2AccessToken wxMpOAuth2AccessToken = new WxMpOAuth2AccessToken();
        try
        {
            wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
        } catch (WxErrorException e)
        {
            log.error("【微信网页授权】{}", e);
            throw new SellException(ResultEnum.WECHAT_MP_ERROR.getCode(), e.getError().getErrorMsg());
        }

        String openId = wxMpOAuth2AccessToken.getOpenId();

        // 这里要特别注意,url里的参数必须写openid,不能写成openId,因为前端代码是获取openid的值
        return "redirect:" + returnUrl + "?openid=" + openId;
    }
}